I hope this Isn't True , but It did Raise a question in my mind .

this is a discussion within the Saints Community Forum; Originally Posted by Danno
Drew has always slightly underthrown receivers deep.
I didn't really notice anything different this year.
But who knows? This staff has shown a tendency to hide injury news from the media before.
Oh-uh! Here comes InjuryGate. ...

A lack of 'zip' or armstrength doesn't neccesarily have to be because of a shoulder or arm injury, it can b soemthig completely different that still affects the throwing motion, a bum knee or ankle or what not.

From my understanding the legs is used to zip the ball, than the upper-body which his arms maybe fatigued